I think I have just the app you need. It's called Bust a Move Video Delay (BaM Video Delay).
It shows what just happened with a delay up to 2 minutes. There is a 2x2 mode where you can have 4 separate views with separate delays. This way you can see something up to 4 times in a row if needed. Also you can switch to the back camera. This way the person watching is not blocking the camera so someone else can doing something in front of it.